Quality — 17c61 Ecu Pinout Extra

With ECU_Whiz's guidance, Alex was finally able to diagnose the issue with the Focus ST's engine. It turned out that a faulty wiring harness had caused a signal mismatch between the ECU and the engine's sensors. With the correct pinout and a new wiring harness, the car was back on the road, running smoothly and efficiently.

(34+34+18).

| Pin | Wire Color | Signal Description | | :--- | :--- | :--- | | | — | Not Used | | 2 | YEL/BLK | Ignition Coil Trigger | | 3 | — | Not Used | | 4 | — | Not Used | | 5 | YEL/GRN | Fuel Pump Relay Output | | 6 | BLK/WHT | EVAP Purge Control Solenoid Valve | | 7 | RED/BLU | PGM-FI Main Relay 1 | | 8 | GRN/WHT | CMP (Camshaft Position) Sensor (+) | | 9 | RED | CMP Sensor (-) | | 10 | BLU/RED | EGR Valve Lift Sensor Signal | | 11 | YEL | EGR Valve Lift Sensor Power (+5V) | | 12 | — | Not Used | | 13 | — | Not Used | | 14 | BLU | CAN High (Communication) | | 15 | RED | CAN Low (Communication) | | 16 | WHT | Injector #3 | | 17 | RED/BLU | Injector #1 | | 18 | YEL | Injector #2 | | 19 | BLU | Injector #4 | | 20 | — | Not Used | | 21 | GRN/BLK | Power Ground (Driver Side) | | 22 | BLK | Power Ground (Driver Side) | | 23 | BLK | Power Ground (Driver Side) | | 24 | BLK | ECU Ground (Logic) | | 25 | RED/WHT | A/C Clutch Relay Signal | | 26 | GRN/RED | EVAP Bypass Solenoid Valve | | 27 | RED/GRN | EVAP Vent Solenoid Valve | | 28 | — | Not Used | | 29 | RED/YEL | EGR Valve Lift Sensor Ground | | 30 | WHT/RED | A/C Switch Input | | 31 | GRN/WHT | A/C Compressor Signal | 17c61 ecu pinout

Leave a comment with your engine code and VIN prefix. With ECU_Whiz's guidance, Alex was finally able to